Locking means for accumulator controls



Oct. 23 1923.

1,471,770 F. W. BERNAU LOCKING MEANS FOR ACGUMULATOR CONTROLS 1922 2 Sheets-Sheet 1 Filed June 17 1,471,770 F. w. BERNAU LOCKING MEANS FOR ACCUMULATOR CONTROLS 2 Sheets-Sheet 2 Filed June 17. 1922 5 plates whic Patented Oct. 23, 1923.

UNITED STATES 1,471,710 PATENT OFFICE.

, mnnsmcx w. BEBNAU, or NEWARK, NEW Jensen. ASSIGNOR TO ELLIS Alumna TYPEWRITER COMPANY, OF NEWARK,

Application filed June 17,

To all whom it may concern:

Be it known that I F nsonmcn W. BER- NAU, a citizen of the Uinited States, residing at Newark, in the county of Essex and State .3 of New Jersey, have invented certain new and useful Improvements in Locking Means for Accumulator Controls, of which the following is a specification.

This invention relates to locking means for the shift bar Whose position determines whether addition or substraction will be performed in the well known Ellis adding and substracting machine.

In the patent to Halcolm Ellis, No.

1,203,863, dated November T, 1916, for Meanical calculator there is set forth 'and claimed a shift bar which is ada. ted to be turned one way or the, other, w en the machine is operated, according to' whether the machine is set for'addition or subtraction. This shift bar, in turn, controls the operation of certain pivoted cam plates and a carrying pivoted detent segment operated thereb in such manner that those calm control the subtracting opera.- .tion will be locked by the shift bar when the machine is set for addition and, on the other hand, those which control the operation of substraotion will be released and the addingcam plate locked when the machine is set for, subtraction. Thus, as predetermined by the setting of the machine either for addition or for subtraction, the .-shift bar will be turned when the machine 5 is operated and the carrying mechanism will be arnanged for operation to effect carrying for that operation of the machine. My presentinvention relates to means for positively looking or latching the shift bar in either the addin or the subtracting positionso that it wi be impossible for it to accidentally move when it has been set, thus preventing false operation or false result 1n calculation 'oocuring from this cause and insuring mtention'ofthe shift bar in its,

reviously ,set position until the machine;

i as performed its cycle of operations, or until it is desired to move the shift bar to its other set position. v

A practical embodiment of locking or latching means for the shift bar comprises the pair of locking latches hereinafter desm'ibed fand which are shown in the acoompa'hyin drawings. One of these latches docks the s ift'bar when it is set for adclaims:

NEW JERSEY, A CORPORATION OF NEW LOCKING MEANS FOR ACCUMULATOR CONTROLS.

1922. Serial No. 568,349.

dition, as predetermined by the operation of the setting of a suitable key of the machine; the other latch locks the shift bar when it is set, for subtraction, as predetermined by the operation of a suitable key. The latches are spring-act11ated and adapted for independent movement under the actuation of. their springs, one of the latches being adapted to drop in front of the shift bar and the other to drop in the rear thereof but only one latch being effective at a given time. The tvvo latches are subject to the control of the carrying bur Whose construction and operation is set forth 'in the Ellis Patent No. 1,203,863, the carrying bar being the instmmentality which cooperates with the detent-operating cam plates as explained in that patent. i It is unnecessary to employ more than one pair of locking latches in carrying out the present invention. This 'airoflatches may be pivoted to one of the xed order plates? describedin the aforesaid patent but they are conveniently pivotally mounted on the order plate representing the units position as they are more accessible in that position. Preferably, the pair of locking latches is. pivoted in line with the pivots ofthe carry-i inficam plates.

eference is to be had to Ellis Patent No. 1,203,863, November 7, 1916. fora full disclosure of the machine on which the present improvements are used as I have only shown so much of the shift bar and the other members of the adding and'suhtraz-ting nccumu lator of that patent as will afford a clear understanding of the manner in which the present improvements are applied thereto and to illustrate the. principle? iiud operation ofsaid improvements.-

I am aware t-hntchanges might be resorted toin carrying out the principle of the present improvements and I do not limit myself to the specific embodiment of the shift bar lockfconstitutingr the present 100 invention, except where specified in the In the accompenyingdrawings; I

Figure 1 is a. detail section throu h the conne'ting rods, the-carrying bar, an shift bar of the 7 ad ding qaiiid I substracting accumulater of ljaiem; =0: 1,203,863, other parts heingf :bn'ntted,- showed? the two locking latchesfpivdt'ed to "one o the order vlates,

in position for addition, and the carrying bar be ing in normal position. 7

Fig. 2 is a similar view, showing the carrying bar in advanced position and in engagement with both locking latches for the purpose of releasing them from the shift bar so that the shift bar in? be turned to the subtracting position of *ig. '3.

Fig. 3 is a similar view, showing the shift bar turned to subtracting position and latched by the subtracting locking latch, the carrying bar having returned to normal position.

Fig. 4 is a detail side view of the adding locking latch. i

Fig. 5 is a similar view of the subtracting locking latch.

Fig. 6 is a detail view showin the adding and subtracting accumulator 0 1,203,863, the shift bar being set for addition in the position shown in Fig. 1, the parts being in normal position; and

Fig. 7 is a similar view, the shift bar be ing turned to set the mechanism for subtraction, the said shift bar then being in the position shown in Fig. 3. 7

By comprising the showing of Figs. 1 and 6, and Figs. 3 and 7 it will be seen that the present improvements do not modify the construction of the adding and subtracting accumulator of the Ellis Patent No. 1,203,863 but that the latching. or locking device is an additional means which does not modify the operation of the adding and subtracting accumulator but supplements it and insures its accuracy.

It is to be understood that while the look ing means constituting the present invention is shown and described in connection with the adding and subtracting accumulator of Patent No. 1,203,863 and specific reference made to that patent, nevertheless the present improvements are adapted for use in connection with the shift bar N of any embodiment of the Ellis machine employing such a shift bar whether heretofore patented or having to do with other improvements relating to an adding and subtracting accumulator having such a shit bar for which application for patent may be hereafter made.

Referring first to Figures 6 and 7, an understanding may be had of the adding and subtracting accumulator, the shift bar, and carrying bar thereof as set forth in the Ellis Patent No. 1,203,863 of November 7, 1916.

In Figures 1, 2 and 3 there is shown the shift bar and carrying bar of Figures 6 and 7 and the carrying detent segment set forth in the aforesaid patent. Figs. 1, 2 and 3 illustrate the manner in which the locking latches constituting the present invention, are mounted on one of the order plates and are related to the shift bar. and can'ying bar.

Referring to Figs. 6 and 7, it will be un- Patent No;

\ of the wheels derstood that only one unit of the addin and subtracting accumulator is disclosed and that the mechanism is duplicated for the different orders or columns of the machine, except for the units order, whereas the shift bar and'carl'ying bar are in section.

Between certain side frames of the machine there extend horizontal' shafts N which have suitable spacing collars and support the order plates N.

The adding wheels N are mounted on a horizontal shaft :N which extends through the plates N", the end members of the series of plates 1:? being ivotally mounted. plate 50 1s mortise into the ends of the plates N and serves as a brace for maintaining all of the plates in proper sition, and there is thus provided a rockab e frame carrying the adding Wheels N. The rocking of this frame causes thewheels N to engage or disengage the racks or actuators R whose movement is controlled by the keys of the machine and the operating mechanism thereof.

Means is provided for swinging the frame carrying the wheels N, as explained in Patent No; 1,203,863.

Mounted in the wheel carrying frame and upon the shaft N are a series of hooks N" and N, whose points are adapted to come into the plane of the two-pointed cam N secured toeach of the wheels N. Springs N actuate the hooksN and N so that their points tend to move toward the center of the cam N. The shape of the point of hook N is such that in rotating the cam N in a direction so that it strikes the point of the hook N while moving in a direction toward the shaft N the hook N will rise up and a point of the cam N will pass underneath it. On the other hand, if the'rotation of the cam N is in the'reverse direction so'that it engages the hook N in a direction moving from the shaft N, the cam N will be arrested against the inside of the hook N.

As shown in Figs. 6 and 7 and more clearly'in Figs. 1, 2 and 3, there is pivoted to each order plate NF at N, a swinging toothed detent or carrying segment N" which are adaritxed to mesh with the teeth when the latter become disengaged from the racks RF; and when the wheels N" are in full engagement with the racks R the teeth of the wheels N just clear the teeth of the segment. Each segment hasa pin N projecting from its side. Each segment N is under the control of two cam plates N" and N", the former being adapted to control the operation of the segment N for purposes of addition, and the latter serving to control the detent N. for pu] plates N and N? are pivoted to the order plates at N and each plate is proof subtraction. The cam vided with an eccentric and somewhat in regular-shaped slot which loosely embraces the pin N. The slot in the cam plate N" is so arran ed that its rotation about the pin N will cause the in N to move the segment N toward t e right, while the slot in the cam N is so designed that a' is, in a position from which it can be moved in either direction a distance corresponding to one tooth of the segment N when one or the other of the cam plates N N is released by the o ration of the cam N The cam plates and N are held in their upper position by the turnedover ends of the hooks N and N as explained in Patent No. 1,203,863. Suitable springs N cooperating with the cam plates N N tend to rotate them so that their upper ends will move downwardly, or, in other words, against the latched up position which is maintained by the hooks N and N A horizontal bar N which has upward- 1 extending arms at its ends that are suitably pivoted, is normally held in retracted position by a suitable spring. not shown, and is arrested in its retracted position by engagement with shaft N. Suitable means is provided, as explained in Patent No. 1,203,863, for swinging the carrying bar N. The function of the carrying bar N is to restore the cams N and N to a position where they will latched by the hooks N and N after the cams N and N have been unlatched in the operation of carrying."

Suitably journaled in the side frames of the machine and extending underneath the different sets of cam plates N N is a shift bar N which has a longitudinal rib on its upper edge adapted to selectively engage and block all of the adding cam plates N when in one position, as shown in Fig. 7, or all of the subtracting cam plates N when turned to another position. as shown in Fig. 6. The shift bar is turned on its longitudinal axis accordin; to the setting of the machine either for addition or for subtraction. by means described in Patent No. 1203.863.

The adding cam plates N are provided with projecting lugs c and the subtractin cam plates with projecting lugs d with which the upper ridge or rib of the shift bar N engages, according to which way this bar is turned, as shown in Figs. 6 and-7. \Vhen the shift bar N is turned to engage with the lugs d, all of the cam plates N in Figs. 1 to 5 which are used to effect carrying whens position shown in Fig. 7, all of tl'ieadding cam plates N are locked so that they can have no effect u on the detents Nf.

When the shift bar IN engages'the lugs (Z of the subtracting cam plates N", the low er part of said shift bar engages the projections b on the subtracting hooks and moves them so that their points are not engaged by the cams N of the adding wheels hence they are inoperative for purposes of subtraction, similarly, when the shift bar N engages the lug 0, its lower part engages the projections c on the adding hooks N and positions. saidv books .so that the cams N cannot engage them.

The description previously given'afiords.

a clear understanding of the shift bar N" and its purposes in connection with adding and subtracting accumulator so that the construction and operation of the locking means constituting the resent invention will be clearly understoo as said locking means is used for the urpose of securely holding the shift bar N when it is' moverl to either the adding or subtractingiposition illustrated in Figs. 6 and 7.

My present improvements are shown in Figs. 1 to 5, inclusive, and so mueh of the arrangement and operation of the shift bar N and carrying bar N is shown as will afford a clear understanding of the principle of the invention.

Only one set of locking latches, as shown inclusive, is necessary and this set or pair may be-a'pplied to any order plate N but the set is referably'applied to the order plate in the units position hecause this is most accessible, particularly if the locking: latches are to he applied to a machine already manufactured. The order plates N, as manufactured, are each provided with a detent N. \Vhile this detent is not necessary in the-units position, it is shown in Figs. 1, 2 and 3 to illustrate the relationship of the improved locking means but if the locking means isapplied to any other order plate. the detent would necessarily be used on the particular order plate. The locking mechanism comprises two locking latches N" and 70", the former being adapted to lock the shift bar N while it is set for addition as shown in Fig. 1, and the latter to lock said bar'when it is set for subtraction asshown i1i, F igi 3. The latches are made as stampings eachhavin a hole It so that they may he pivotedon 51c same stud N plate N". Each latch is retracted in a counter-clockwise direction by a coil spring Ill N" connected at one end to the order plate N" and at the other end to the latch, separate springs being employed so that the latches are independently spring-actuated.

The latch N" has a hoo -shaped head 1 and it is cut out or formed in such manner that the said head mav hook over the rib at the top of the shift bar N" as shown in Fig. 1 or may be raised entirely clear of the shift bar as shown in Fig. 2, or rest on top of the shift bar as shown in Fig. 3. The locking latch which is adapted to hold the shift bar N against movement when in subtracting position, is provided with a head 2 whic may rest on the rib of the shift bar N as shown in Fig. 1 when the shift bar is set for addition, or may be held clear of the shift bar so that the latter may be set as shown in Fig. 2, or ma back of the rib or the shift bar as shown in Fig. 3 to lock the shift bar in subtracting sition. The latches N" and 70 are provided for locking the shift bar in either the adding or subtractin position so that it s impossible for the shift bar to accidentally move from the position in which it is set and this insures the retention of the cam lates N and N and the hooks N and intheir blocked condition, according to the setting of the shift bar N, until the operation of carrying, for either addition or subtraction has been affected.

The advance of the carrying bar causes it to engage the tails 4 and 5 of the latches N 70", for the purpose of releasing their engagement with the shift bar N so that it may be turned as shown in Fig. 2 and as the locking latch which is performing a lockin action on the shift bar bl has its head 1 or 2) in dropped position, its tail (4 or 5) being rearwardly advanced in relation to the tail of the other latch, said locked latch is first engaged by the carrying har N" and the shift bar N unlocked anl then both latches are held as shown in Fig. 2.

ssuniing that the dition, the shift bar machine is set for ad N" will then be in the osition shown in Fig. 1 and it will he ocked by the head 1 of the latch N". When the arts are in this position, any movement of t e shift bar N" toward the subtracting position illustrated in Fig. 3, is checked.

When the machine is set for an operation of subtraction as shown in Fig. 3, the following operation occurs: During the first 15 of the forward movement of the main drive shaft of the machine, the carging or restoring bar N moves from 0 position shown in Fig. 1 to the poeition shown in Fig. 2 which brings it into contact with the tails 4 and 5 of latches N" and 70". The further rotation of the drive shaft of the machine causes further advance of the carrying her N" and the drop down locking latches are then turned in a clockwise direction on their pivot N against the tension of their springs N'" until the lockin heads 1 and 2 are lifted clear of the shift bar N as shown in Fig. 2, whereupon the mechanism of the machine causes the shift bar N to move to the position shown in Fig. 3, which arranges it for olockin the adding cam plates N and hooks N" and releases the subtracting cam plates N and hooks N so that the accumulator is conditioned to effect carrying during the operation of subtracting. Once the shift bar N has assumed the position shown in Fig. 3, the head 2 of the subtracting locking latch 70 drops down back of the rib on the shift bar and effectually blocks any turning of the shift bar to the adding position of Fig. 1 until the carrying bar N has again advanced to the position shown in Fig. 2 which occurs on the first part of the next operation 7 of the machine.

I claim:

1. In an adding and subtracting mechanism, the combination with accumulator wheels, or two controlling mechanisms, one for addition and the other for subtraction, a settable selector adapted for rendering one of said controlling mechanisms inoperative when the other one is operative, and means separate from said settable selector for ositively locking said settable selector in its respective positions.

2. In an adding and subtracting mechanism, the combination with accumulator wheels, of two controlling mechanisms, one for addition and the other for subtraction, a settable selector adapted for rendering one of said controlling mechanisms inoperative when the other one is operative, and independent locking means each separate from said settable selector. one of which looks the settable selector when it is arranged in adding position, and the other being adapted to lock the settahle selector when it is in subtracting position.

3. In an adding and subtracting mechanism, the combination with accumulator .wheels, of two controlling mechanisms, one

for addition and the other for subtraction, a settable selector adapted for rendering one of said controlling mechanisms inoperative when the other one is o rative, means, separate from said settab e selector for positively locking said settable selector in its respective positions, and means for automatically releasing the locking means when predetermined.

4. In an adding and subtracting mechanism the combination with accumulator whee of two controlling mechanisms, one for ad ition and the other for subtraction, a aattable selector adapted for rendering one of said controlling mechanisms inoperative when the other one is operative, independent locking means each separate from said settable selector, one of which looks the settable selector when it is arranged in addi position, the other being adapted to 125: the set-table selector when it is in subtractin position, and means for automatically isengaiing the independent locking means from t e settable selector when'pre determined.

5. In an adding and subtracting mechanism, the combination with accumulator wheels, of two eontrolli mechanisms, one for addition and the other for subtraction, a settable selector adapted for rendering one of said controlling mechanisms inoperative when the other one is operative, and independent ivoted latches, oneof which looks the setta le selector when it is arranged in adding position, the other latch bei adapted for locking the settable selector w on it isin subtractin osition.

6. In an adding and substracting mechanfin the combination with accumulator w eels, of two controlling mechanisms, one for addition and the other for subtraction, a settable selector adapted f9 rendering one of said controlling mechanisms inoperative when the other one is operative, independent ivoted latches, one of which looks the setta le selector when it is arranged in adding position, the other latch being adapted for locking the settable selector when it is in subtracting position, and means for automatically disengaging the latches from the settable selector when predetermined.

7. In an adding and subtractin mechanism, the combination with a settal ile selector which, when in one position, conditions the mechanism for carrying when an adding operation is being performed and, when in another position conditions said mechanism for carrying when a subtracting operation is bein performed, of means, separate from sai settable selector, for positively locking said settable selector in its respective positions.

8. In an adding and subtracting mechanism, the combination with a settable selector which, when in one positiiih, conditions the mechanism for,carrying when an adding operation is being performed and, when in another position, conditions said mechanism for carrying when a subtracting operation is being performed, of means, separate from said settable selector, for posi- 9. In an adding and subtracting mecha nism,'the combination with means for effecting carrying, of a rockable shift bar adapted, when in one position, to condition the mechanism for carrying when an adding operation is being performed and, when in another position, to condition said mechanism for carrying when a subtractin operation is being performed of indepen ent pivoted latches, one of w ich locks the shift bar when it is set for addition, the othe latch locking the shift bar when it is subtraction.

In anadding and subtractin mechanism the combination with means or effecting carrying, of a rockable shift bar adapted, when in one position, to condition the mechanism for carrying when an adding operation is being performed and when in another position, to condition sai mechanism for carrying when a subtractin operation is being performed, indepen ent locks the shift bar when it is set for addition, the other latch locking the shift bar when it is set for subtraction, and a carrying bar adapted to re-set the carrying mechanism and to release the locking latches aforesaid from the shift bar to permit resettin of the said shift bar.

11. ii an adding and subtracting mecha nism, the combination with means for offecting carrying, of a rockable shift bar adapted, when in one position, to condition the mechanism for carrying when an adding operation is being performed and, when in another osition, tooondition said mechanism for carrying when a subtracti operation is being performed, of indepen ent pivoted latches spring means operating on said latches ten ing to cause them to engage the shift bar, one of said latches being adapted to automaticall when it is set for addition, t e other lateautomatically locking the shift bar when it is set for subtraction, and a. carrying bar adapted to engage the latches and turn them against the actuation of the sprin means to release said, latches from the s ift bar to ermit rel-setting of said shift bar.

n testimon' whereof I a-flix mysi ature.

F EDERICK W. B'ER AU.

ivoted latches, one of which, a

loc the shift h". i 

